I recently had to reinstall P3DV3 due to some issues and their recommendation was to do a clean reinstall. Just to ensure I had new aircraft working fine with new install, I had uninstalled all of my aircraft prior to the P3DV3 uninstall and knew I would have to reinstall them.

I downloaded from SimMarket the citation x 750 extreme v2.0. I ensured to install with the "run as admin" option. I re-activated the plane on the last option during install. I then downloaded the citation x2.0 update 3.07 PDF because initially I was receiving the hyperguage.dll error. That was resolved with the CX2.0 with P3DV3 Vital Requirements DLL.XML coding added. That corrected that issue between the two; run as admin and the DLL.XML update. Now upon launching the plane in P3DV3 the screens are blank. I ensured the EICAS is in the full up position, AVN and the stby power switch was on too by being in the full up position.

I then downloaded the citation x2.0 update 3.07 PDF because initially I was receiving the hyperguage.dll error. That was resolved with the CX2.0 with P3DV3 Vital Requirements DLL.XML coding added. That corrected that issue between the two; run as admin and the DLL.XML update.

Now upon launching the plane in P3DV3 the screens are blank. I ensured the EICAS is in the full up position, AVN and the stby power switch was on too by being in the full up position.

SM does have most recent 3.02.11 version for redownload which is probably more recent than yours.
Note: Proper reinstallation and proper first run in sim will yield non blank screens. We know, we tested before release.

I did my re-install from SM just when I started seeing this issue. So 2 days ago, logged into my account and downloaded from their site. So if they have the most recent, I would have downloaded the most recent version as of 2 days ago. I do typically save my downloads in my 2nd partition, but in this case, I did go to the site and downloaded straight from there a new copy.

I guess to just be crystal clear, this is what I did.
~I did control panel > citation > uninstall
~(other add-ons the same)

~Then I did the comprehensive uninstall of P3DV3, and reinstall.
~Logged into SM, went to my orders, did new download of EAGLESOFT - CITATION X EXTREME 2.0 FSX P3D. Did "run as admin" for the setup exe.
~After install and re-activation, Initially I was seeing the hyperguage error message, so I updated the xml file and no logner see that issue.
~Blank screen still occurring.

Please help me, what or where did I go wrong? I'm just not sure what you're meaning when you say the redownload is probably more recent than mine, if I a brand new download just 2 days ago. I don't have an objection to doing the uninstall again, and going back to simmarket to do another download. If I do that, I'm just wanting to confirm how I need to do it differently. Do I need to remove the add on part from the XML file that the doc I used said to add to get rid of the hyperguage error too?

I did my re-install from SM just when I started seeing this issue. So 2 days ago, logged into my account and downloaded from their site. So if they have the most recent, I would have downloaded the most recent version as of 2 days ago. I do typically save my downloads in my 2nd partition, but in this case, I did go to the site and downloaded straight from there a new copy.

I guess to just be crystal clear, this is what I did.
~I did control panel > citation > uninstall
~(other add-ons the same)

~Then I did the comprehensive uninstall of P3DV3, and reinstall.
~Logged into SM, went to my orders, did new download of EAGLESOFT - CITATION X EXTREME 2.0 FSX P3D. Did "run as admin" for the setup exe.
~After install and re-activation, Initially I was seeing the hyperguage error message, so I updated the xml file and no logner see that issue.
~Blank screen still occurring.

Please help me, what or where did I go wrong? I'm just not sure what you're meaning when you say the redownload is probably more recent than mine, if I a brand new download just 2 days ago. I don't have an objection to doing the uninstall again, and going back to simmarket to do another download. If I do that, I'm just wanting to confirm how I need to do it differently. Do I need to remove the add on part from the XML file that the doc I used said to add to get rid of the hyperguage error too?

Thanks in advance
Mark

Mark get rid of/or rename all dll.xml files in the path: C:\ProgramData\Lockheed Martin\Prepar3D v3. and the path: C:\Users\User\AppData\Roaming\Lockheed Martin\Prepar3D v3. DO NOT EDIT any new dll.xml files after reinstall.

Uninstall, then carefully reinstall w/AV disabled. Run the simulator,select the CX and ignore any warnings. Exit and restart sim and CX. Then report back.